Table 2. Star balance test (unit: cm)

SBT	Group	Pre	Post	Time	Time×group	Group
Ant	THC	75.63±9.77	82.66±10.37	429.69*	1.43	0.30
	BHC	73.32±8.22	81.56±7.65
	SHC	73.39±7.47	80.26±7.44
Post-med	THC	87.62±12.65	94.50±8.90	143.07*	5.29*	1.17
	BHC	83.60±9.62	96.50±6.19
	SHC	87.85±10.59	101.53±5.81
Post-lat	THC	88.13±13.17	95.80±11.22	235.89*	10.25*	2.12
	BHC	85.65±10.74	99.90±6.43
	SHC	90.38±10.35	107.01±7.41

SBT: star balance test.
Ant: anterior reach distance.
Post-med: posteromedial reach distance.
Post-lat: posterolateral reach distance.
THC: stable surface-based hip joint closed-chain exercise group.
BHC: balance cushion-based hip joint closed-chain exercise group.
SHC: sling-based hip joint closed-chain exercise group.
p<0.05.